A total of 24 tiger sharks off of Maui are now being tracked with satellite tagging devices as researchers with the University of Hawaiʻi continue to study their movement following an increase in the number of unprovoked shark bite incidents last year.

According to the Division of Aquatic Resources, this is the thirteenth reported shark incident statewide this year, and the eighth in Maui waters. The agency notes that over the last 20 years, Hawaiʻi has averaged about four unprovoked shark incidents per year, but numbers per individual year are “highly variable.”

So far, the website features tracking of seven sharks–one male and six female–ranging in size from 9.3 feet to 14.2 feet. The tracking dates back to the period starting between Oct. 17 and 20, 2013, when the sharks were first tagged with the satellite devices.